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Salaries and social security payables - Payables (Details) - ARS ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Current |  |
Vacation and bonuses | $ 1,433 | $ 1,102
Social security payables | 499 | 383
Termination benefits | 119 | 125
Total current salaries and security payables | 2,051 | 1,610
Non-current |  |
Termination benefits | 160 | 144
Bonuses | 99 | 40
Total non-current salaries and security payables | 259 | 184
Total salaries and social security payables | $ 2,310 | $ 1,794

X
- Definition The amount of non-current bonuses payable to employees. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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X
- Definition No definition available + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition No definition available + References No definition available. + Details
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Namespace Prefix: | teo_
Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition The amount of current salaries and social security payables to employees. + References No definition available. + Details
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Namespace Prefix: | teo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of non-current salaries and social security payables to employees. + References No definition available. + Details
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Namespace Prefix: | teo_
Data Type: | xbrli:monetaryItemType
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- Definition The total amount of salaries and social security payables to employees. + References No definition available. + Details
Name: | teo_SalariesAndSocialSecurityPayables
Namespace Prefix: | teo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of current social security payables to employees. + References No definition available. + Details
Name: | teo_SocialSecurityPayablesCurrent
Namespace Prefix: | teo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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X
- Definition The amount of current expense in relation to termination benefits. Termination benefits are employee benefits provided in exchange for the termination of an employee's employment as a result of either: (a) an entity's decision to terminate an employee's employment before the normal retirement date; or (b) an employee's decision to accept an offer of benefits in exchange for the termination of employment. + References No definition available. + Details
Name: | teo_TerminationBenefitsPayableCurrent
Namespace Prefix: | teo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of non-current expense in relation to termination benefits. Termination benefits are employee benefits provided in exchange for the termination of an employee's employment as a result of either: (a) an entity's decision to terminate an employee's employment before the normal retirement date; or (b) an employee's decision to accept an offer of benefits in exchange for the termination of employment. + References No definition available. + Details
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Namespace Prefix: | teo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of current vacation and bonuses payable to employees. + References No definition available. + Details
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Namespace Prefix: | teo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant